Microstructure and magnetoresistance in La0.67Ca0.33Mn1-xVxO3 (x=0, 0.03, 0.06, 0.1, 0.15 and 0.25) compound

被引：32

作者：

Gencer, H. ^{[1
]}

Kolat, V. S. ^{[1
]}

Atalay, S. ^{[1
]}

机构：

[1] Inonu Univ, Sci & Arts Fac, Dept Phys, Malatya, Turkey

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 422卷 / 1-2期

关键词：

manganites; V substitution; colossal magnetoresistance;

D O I：

10.1016/j.jallcom.2005.12.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure and magnetoresistance properties of the polycrystalline La0.67Ca0.3Mn1-xVxO3 were systematically investigated as a function of V-doping level. X-ray powder diffraction indicated that the substitution of Mn by V produced no structural change and only the diffraction lines for cubic perovskite were obtained for all samples. The detailed EDX analysis showed the existence of two phases in La0.67Ca0.3Mn1-xVxO3 (x = 0.03, 0.06, 0.1, 0.15 and 0.25) samples. The temperature dependence of resistance showed two maxima in the V-doped sample for x <= 0.15, and the peak value of magnetoresistance (MR) around insulator-metal transition temperature was increased with V-doping. Double maxima in the resistance-temperature curves were explained by the existence of two phases in La0.67Ca0.3Mn1-xVxO3 samples. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：40 / 45

页数：6

共 30 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].

ANDERSON, PW ;

HASEGAWA, H .

PHYSICAL REVIEW, 1955, 100 (02) :675-681

[2] Structural, magnetic, and transport properties of the giant magnetoresistive perovskites La2/3Ca1/3Mn1-xAlxO3-delta [J].

Blasco, J ;

Garcia, J ;

deTeresa, JM ;

Ibarra, MR ;

Perez, J ;

Algarabel, PA ;

Marquina, C ;

Ritter, C .

PHYSICAL REVIEW B, 1997, 55 (14) :8905-8910

[3] FERROMAGNETIC (LASR)MNO3 FILMS DEPOSITED BY RF-SPUTTERING [J].

CHO, JY ;

GOMI, M ;

ABE, M .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1990, 29 (09) :1686-1689

[4] EFFECTS OF DOUBLE EXCHANGE IN MAGNETIC CRYSTALS [J].

DEGENNES, PG .

PHYSICAL REVIEW, 1960, 118 (01) :141-154

[5] Spontaneous behavior and magnetic field and pressure effects on La2/3Ca1/3MnO3 perovskite [J].

DeTeresa, JM ;

Ibarra, MR ;

Blasco, J ;

Garcia, J ;

Marquina, C ;

Algarabel, PA ;

Arnold, Z ;

Kamenev, K ;

Ritter, C ;

vonHelmolt, R .

PHYSICAL REVIEW B, 1996, 54 (02) :1187-1193

[6] Colossal magnetoresistance of ferromagnetic manganites: Structural tuning and mechanisms [J].

Fontcuberta, J ;

Martinez, B ;

Seffar, A ;

Pinol, S ;

GarciaMunoz, JL ;

Obradors, X .

PHYSICAL REVIEW LETTERS, 1996, 76 (07) :1122-1125

[7] Magnetocaloric effect in the La0.62Bi0.05Ca0.33MnO3 compound [J].

Gencer, H ;

Atalay, S ;

Adiguzel, HI ;

Kolat, VS .

PHYSICA B-CONDENSED MATTER, 2005, 357 (3-4) :326-333

[8]

HOLMOLT RV, 1993, PHYS REV LETT, V71, P2331

[9] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

[10] THOUSANDFOLD CHANGE IN RESISTIVITY IN MAGNETORESISTIVE LA-CA-MN-O FILMS [J].

JIN, S ;

TIEFEL, TH ;

MCCORMACK, M ;

FASTNACHT, RA ;

RAMESH, R ;

CHEN, LH .

SCIENCE, 1994, 264 (5157) :413-415

← 1 2 3 →